Rotary scrubbing-machine.



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N0.4889,309. PTBNTED JUNE 2, w08 l fr. R. JENKINS, JB. RGTARY SGN'UBBING MACHINE.

APPLIGATIQN FILED AUG. 17, 190e.

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THOlllAS R." JENKINS, JR., OF BALTIMORE, MARYLAND ROTARY SCRUBBING-MACHINE.

Specification of Letters Patent.

Patented June 2, 1908.

Application filed August 17, 1906. "Serial No. 330,960.

. struction of mac iincs of this c ass to enable them to bc operated more successfully.

The invention consists in the novel construction, combination and arrangement of the parts as hereinafter described and pointed out in the claims, reference being had to the accompanying drawings, in which,

Figure 1 shows side elevation of the machine. Fig. 2, a plan view ol the saine. Fig. 3, a central vertical cross-section of the same, and Fig. 4, a detail plan View of the detached brush and ring-plate.

Referring to the drawing by numerals, 1 designates a horizontal. tubular shaft which is provided at its inner end with a longitudine ly-extcnding projection, 2. A yoke, S, has the lower ends of 'its arms, 4l, perforated to provide bearings in. which the shaft, 1, turns, and a main driving wheel, 5, is keyed or otherwise secured on the shaft between the rms of the yoke and travels by contact with the surface that is to be scrubbed. A gear, fi, has a hub, 7, which is provided with a groove, $3, and said gear has position adjacent the inner end of' the horizontal shaft, and the groove, 8, receives the projection, 2, on the end ci the shaft and the two are thereby held in locked engagement so as to be revolved together.

When the gear and shaft have been locked together a bolt, 9, is oassed through the hub of the gear and also through the hollow shaftand the end, 10, of said bolt will also project beyond the arm of the yoke. A washer, 11, is 'fitted over the projecting end of the bolt and against the vertical surface ot' the yokearm and a cotter-pin, 12, is passed through a perforation in the end of the bolt and serves to kee .i the gear and shaft in engagement.

At t le upper end the yoke is provided with a verticallyrejecting stem, 13, around the base ol whic iis a bearing, I4, which is seated on top of the yoke. The upper end ol the steniis provided with screw-threads, 15.

A gear, 16, is sustained horizontally on the stem, 13, and said 'ear seats on the bearing, 14; The shape of t is gear is such as to form a cap over the yoke and driving-wheel and this gear meshes with and is driven by the vertical gear, 6.

Arms, 17, are cast integral with the horizontal gear, 16, and project laterally from said gear, and each arm is provided with an interna-lhT screw-threaded perforation, 18, in its outer end` Thesearms may vary in number but inthe present instance four are provided, and the purpose of these arms is 'to sustain the scrubber so the latter may be maintained in contact with the surface to belscrubbed at a uniform pressure as will presently bedescribed.

The scrubber in the present instance, coinprises a plurality of brush block sections, 19, each of which has a curved outer surface, 20, and a straight inner surface, 21, so-that when the sections are in proper position with respect to each other, the scrubber will be eircular in form with a square opening, 22, at the center.

A. metal ring-plate, 23, is seated on the top surface of the brush-blocks, 19, and said ring-plate is provided with a plurality ci perforar-tions, 2li, through wh'ch screws or other securing devices, 25, on the brush blocks may pass to hold the brushes to the ring-plate. erforations, 2'?, are also rovided in the ring-plate and these perforation-s have a position so as to open into the vsquare opening, 22, at the center or" the brushes.

Rods, 2S, having heads, 29, are inserted from the bottoni ot' the ring-plate through the perforations, 27, and the upper ends of said reds are provided with screw-threads, 30, which pass through the perforations, 18, in the arms, 17, and adjustably engage the threads therein. Nuts, 31, are carried on the rods, 23, below the arms, 17, and coiled springs, 32, encircle the rods and are compressed between the nuts and the ring-plate and exert a constant downward pressure on the ring-plate and brushes. By adjusting the nutson the rods, 28, the pressure of the springs on the ring-plate and brushes may be varied..

A bracket, 33, has one end nivotally engaged by the stem, 13, and is eld in such engagement by -a nut, 34. This bracket eX- tends laterally from the stein and projects over and beyond the arms, 1?,.and the rim of the brushes and thon turns'downwardly and at its lower end is provided with a revolving support, 35, which rolls on the surface being scrubbed.

A socket member, 36, in which an operating rod, 37, is inserted. is provided with a bifurcated lower end, 3S, which straddles and Jrojects downwardly on opposite sides of the bracket and at the lower end this socket member is pivotally attached at, 39, to said bracket. A lug, 40, is provided on the downwardly-turned portion of the bracket and serves as a stop for the socket member when the handle or operating rod is lowered. By thus pivoting the operating rod to the bracket the same may be lowered to enable the brusli to be rolled under an article of furniture to scrub a floor and the. machine can thus be operated in places where otherwise it could not be used.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is;`

1. A rotary scrubbing machine having a circular brush; a driving wheel around which the brush is to be revolved a yoke sustained by the driving Wheel a gear at the side of the yoke and revolved by the said driving wheel; a second gear covering the yoke and driving wheel and meshing with the firstnamed gear; and rods sustained by the second gear and loosely connecting the circular brush.

2. A rotary scrubbing machine having a brush; a central driving wheel around which the brush is to be revolved; a yoke sustained by the central driving wheel gears revolved by the said central driving wheel; means for yieldingly sustaining the brush from one of said gears; a bracket extending laterally from a point above the central driving wheel and having a revolving support at its outer end and an operating rod pivotally connected to said bracket. I

3. A rotary scrubbing machine having a agears and havinor screw-threaded brush, a central driving wheel around which the brush is to be revolved; a yoke sustained by the driving wheel and having a stem pro# jecting therefrom; a gear sustained at the side of the yoke and revolved by the' driving wheel; another gear mounted on the yoke stem and covering the yoke and driving wheel and meshing with said first named gear; and rods supported by and radiating from the gear on the yoke-stern and yieldingly sustaining the brush.

4. A rotary scrubbing machine having ak brush, a central driving wheel around which the brush is to be revolved; a tubular shaft Vextending through the driving wheel; a yoke sustained by the tubular shaft; a vertical gear at the end of said shaft and beyondthe yoke; a bolt extending through the tubular shaft and holding the vertical gear in engagement with the end thereof; a horizontal gear sustained on top of the yoke and covering the driving wheel and meshing with the gear at the end of the tubular shaft, and rods sustained by the horizontal gear and having 1 their lower ends connected with the brush.

5. A rotary scrubbing machine having a circular brush; a single central driving wheelI around which the brush revolves; a yoke sustained by the central driving wheel gears r revolved by the said central driving wheel; arms projecting laterally from one of said erforations in 'their outer ends; screw-t readed rods adjustable in the perforations of said arms and having their lower ends loosely connected with the brush; coiled springs encircling said rods, and means on the rods for varying the pressure of said springs.

ln testimony whereof l aliix my signature in presence of two Witnesses.

THOMAS R. JENKINS, JRf Witnesses:

G. FERDINAND Voor, CHARLES B. AMANN, Jr. 

